SoundFX Direct Fit Muffler
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Walker SoundFX Direct Fit Muffler

Part No. 18331 Warranty Details  

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SoundFX® mufflers are engineered with 100% aluminized steel for longer service life compared to low carbon steel. These mufflers have mechanical interior joints for durability, and spun-locked heads for resistance to rupture from backfires. SoundFX® mufflers are available in direct fit and universal styles, both with quality appearance and favorable acoustics.

Product Features:
  • Aluminized steel construction for corrosion resistance and durability
  • Spun-locked heads for rupture resistance
  • Tube-and-partition style interior design
  • Mechanical interior joints for durability
  • Spot welded bushings provide stability and system support
  • Available with reinforced bracketed heads
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Body Height:6.000 in
Body Length:15.000 in
Body Material:Steel
Body Width:6.000 in
Fitment:Direct OE Replacement
Grade Type:OEM Standard Part
Inlet Configuration:Offset
Inlet Connection Type:Pipe Connection
Inlet Quantity:1
Muffler Inlet Diameter 1:1.750 in
Muffler Inlet Diameter Designation:Inside Diameter
Muffler Outlet Diameter Designation:Inside Diameter
Muffler Type:Combination
Outlet Configuration:Offset
Outlet Connection Type:Pipe Connection
Outlet Diameter:1.500 in
Outlet Quantity:1
Overall Length:19.000 in


by PowerReviews
WalkerSoundFX Direct Fit Muffler

(based on 1 review)

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  • 1 Stars



Reviewed by 1 customer

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you cant improve perfection


from Mt Vernon,Illinois

About Me Auto Enthusiast

Verified Buyer


  • Easy To Install
  • Great Sound
  • Perfect Fit


  • None

Best Uses

  • Replacement
  • Restoration

Comments about Walker SoundFX Direct Fit Muffler:

I used this muffler for a vehicle not listed as the typical replacement item. The product specifications and dimensions were right on, allowing me to expect a good fit, and the installation was trouble-free, It looks better than the muffler listed for my car, and sounded better,too. Plus this one has a heat shield attached, making the unit safer than the original replacement.

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1 Question | 1 Answer
Displaying question 1
  • Q:

    Inlet and outlet sizes and overall length and diameter?
    Asked on 9/23/2013 by Barnard1964 from Birmingham, Al

    1 answer



      Hi Barnard, this Walker Sound Solution Muffler - Part No. 18331 has the inlet diameter : 1.75 inches, outlet diameter : 1.5 inches and overall length : 19 inches. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

      Answered on 9/23/2013 by Morgan from AAP
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